关于 widget entension ，我按照官方demo去实际添加了 widget extension，模拟器上运行后，能在屏幕上看到widget卡片样式，但是，点击左上角添加时，列表里没有demo项呢，我是按照官方视频搞的，视频里就有，为啥我这没有呢
liumingzhi123
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